Journal Hafner, M.S. 1977 Ventura, 1680 m., San Luis Potosi, Mexico 25 July (cont) The habitat was basically low grasses, almost lawn-like, with occasional small mesquite bushes. The natural habitat was mesquite - Opuntia desert. Much of the surrounding land was now in agriculture. Map of trapsite: General locality Tinaja Hwy 57 San Luis Potosi railroad 40 km. Trap sets: Agriculture Hwy 57 Railroad J2 M2 J1 M1 J2 M2 J1 M1 J2 M2 J1 M1 J2 M2 J1 M1 J2 M2 J1 M1 J2 M2 J1 M1 to Villa Hidalgo ditch Fence Agriculture co. 10 m. To San Luis Potosi. dirt road Ventura N N x = trap set of MSH J = " " " set subscript = no. traps/set. circled set = successful = melanistic individual